Electricity-meter.



G. A. SCHEEFFER.

ELECTRICITY METER.

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1,137,027. Patented Apr. 27, 1915.

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G. A. SCHEEFFER.

ELECTRICITY METER.

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1,137,027. Bauma Apr. 27, 1915.

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ELECTRICITY METER.

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1,137,027. Patented Apr. 915.

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@as eA. 'c/zeqer M u Ey AvoP/zegj ED STATES PATENT orales.

GUBTAVE A. SCHEEFFER, OF INDIANAPOLIS, INDIANA, ASSIGNOB, BY MESNEASSIGN- MENTS, TO ROLLER SMITH CO., F NEW YORK, N. Y., A CORPORATION OFNEW YORK.

ELECTRICITY-METER.

Specification of Letters Patent.

Patented Apr. 27, 1915.

Application led September 28, 1910. Serial No. 584,173.

To all Iwhom. it may concern.'

Be it known that I Gns'rava A. Scamarrna, a citizen of the nited States,resdin at Indiana olis, in the county of Marion an State of ndiana, haveinvented a certain new and Improved Electricity-Meter, of which thefollowing is a full, clear, concise, and exact description, referencebeing had to the accompanying drawings, forming a part of thisspecification.

My invention relates to an improved form of electricity meter,characterized by an armature rotatably mounted and provided with aplurality of windings having independent magnetic cores adapted to berought into inductive relation with suitable field coils to rotate thearmature. The cores referred to extend in planes perpendicular to theaxis of rotation of the armature and the field coils are so disposedthat the ends of the cores enter suc-h coils durin their rotation. Twofield coils are provide( in connection with each end of the magneticcores, these field coils being so dis laced that they overlap each otherso that t e armature cores have exerted upon them a continuous rotativetendency between points of commutation. The field coils and armaturewindings are further so related that, if subjected or any reason to theaction of external magnetic fields, the strength of one set of cles ofthe magnetic cores is increased, and) the other set of poles of suchcores is corespondingly decreased, thus maintaining a constant rotativeeffort between the armature and the field coils for an given conditionof current flow through t e meter windings. The meter may therefore besaid to be astatic in its operation.

The several drawings illustrating my invention are as follows:

Figure 1 is a side view of the com lete meter structure. Fig. 2 is a topview o the parts shown in Fig. 1. Fig. 3 is a view of the armature takenalong the line 8-3 in- Fig. 1. Fig. 4 is a view of the armature takenalong the line 4-4 in Fig. 1.

Similar numerals refer to similar parts throughout the several views.

As shown in Figs. 1 and 2, the armature 1 is mounted upon a shaft 2supported inl bearings 3 and 4 by brackets 5 and 6 respectively from thebase 7. The bracket 5 has supported therefrom, concentrically with theearin 3 a rocker arm 8 which carries the brush olders 9, b which in turnthe brushes are supporte in proper position relatively to the commutator11 mount-- ed upon the shaft 2 and connected with the armature windin asindicated.

As shown in igs. 3 and 4 the armature consists essentially of two disks12 and 13 carried by the shaft 2 between which are mounted the armaturewindin s 14. The windin 14 are provided with independent magnetic cores15 extending through such windings and the ends of these cores are splitas indicated in Figs. 8 and 4 and bent out radially away from the shaft2 in planes substantiall at right angles to such shaft, the outwar lyextending ends being secured to the disks 12 and 13 b means of screws orrivets 16. The ends o the divergent magnetic paths are bent around theedges of the disks 12 and 13 to secure them more rmly to such disks. Asindicated in Fig. 4, the terminals of the windings 14 extend throu hbushings 17 in the disk 12 and thus to t e segments of the commutator11. The disks 12 and 13 are of nonmagnetic material and preferably ofmetal, as aluminum.

The armature construction just described is not claimed herein as itforms a part of my invention disclosed in my copending application,Serial No. 538,029, filed January 14,

The field coils 18, 19, 20 and 21 are supported by the bracket 22 fromthe buse 7 1n such a manner that the coils 18 and 19 are discposed uponopposite sides of the shaft 2 an each spans a portion of the disk 12, asa result of which the ends of the armature cores carried by such diskpass into and out of such field coils as the armature rotates.

The field coils 2O and 21 are similarly disposed relatively to the disk13 but are placed at such an angle to the coils 18 and 19, as shown inFi 2, that as the magnetic armature poles o one sign are leaving theposition of ygreatest effective rotative effort, for example in coil18,: the other ends of these cores, which are oppositely magnetized, are

brought into a position relatively to the field coil 21 so that arotative eiort in the same direction is produced upon the armature bythe field coi 21 which continues nearly to the point of commutation. Inother words, the magnetic poles produced by the armature windings, asthey move from one point of commutation to the other, are subjected torotative efiort in the same direction which is practically continuousand extends over the greater portion of the arc between the points ofcommutation. In the construction shown in the drawings the direction ofcurrent flow through the armature windin s is changed by the commutatoras the wi ings pass a vertical plane through the shaft 2 which issubstantially parallel to the base 7. The field coils 19 and 2O coperatewith the windings on the other side of the armature in a manner similarto that described above for the field coils 18 and 21. Due to theparticular winding on the armature which I employ, the line of reatestmagnetic moment is at right ang es to the line of contact of the brusheson the commutator. This is different from the well known Gramme or drumwinding of a ring or drum armature. Considering one armature disk asdivided by the line joining the point of contact of the brush, the polepieces on one side of the line are of north polarity while the polepieces on the other side o the line are of south polarity. It isthusreadily seen that the line of greatest ma etic moment of thearmature is substantially at right angles to the line of greatestmagnetic moment of the field, as is well known and common in directcurrent motor practice.

The base 7 has mounted thereon upon suitable spools 23, resistances 24which are connected in series with the armature windings so that thecircuit thus formed may be connected across the mains of the supplycircuit being measured and thus constitutin the pressure circuit of themeter. The fiel coils are preferably connected in series and in circuitwith the load current or a shunted portion thereof accordin to theamount of the load, such field coils eing connected so as to produce therotative results indicated above. It will, of course, be understood thatany manner of connecting the field coils may be employed which willproduce the desired results under any given set of conditions withoutdeparting from the spirit of my invention.

The shaft 2 carries near its lower end a metallic disk 25 of nonmagneticmaterial which is spanned by the retarding magnets 26 supported by thebracket (i from the base 7. As indicated in the drawings a pair ofretarding magnets is used on each side of the armatureshaftin order. to.exert the requisite amount of retardingzfoi' u on. the armature. Thisis necessary since t e field coil construction above described is veryefficient and the torque produced upon the armature is correspondinglylarge.

Tlie base 7 has exten inf* rearwardly therefrom a'plurality of insu atedbolts 28 for securing the meter to a switchboard or mountin panel andthese posts are also employed as terminals for the meter windml'h ileIhave shown my invention in the garticular embodiment herein described, I

o not, however, desire to limit myself to this construction but desireto claim any equivalent that may suggest itself to those skilled in theart.

What I claim is:

1. In an electric meter the combination of a rotatable armature havin aplurality of independent windings, in ependent cores for said windings,each of said cores having a. pole piece, said pole pieces lying in thesame plane, and a common field coil adapted to surround the pole piecesof said cores as the armature rotates.

2. In an electric meter, the combination of a rotatable armature havinga plurality of windings, an inde endent core for each winding extendingongitudinally of the armature, and two eld coils surrounding oppositepoles of such cores.

3. In an electric meter, the combination of a rotatable armature havinga plurality of windings, an independent core for each winding, and twofield coils on each side of the armature, the coils on one sidesurrounding opposite poles of the same armature .windin cores and thecoils on the other side o the armature surrounding opposite poles ofoppositely magnetized armature windin cores.

4. In an e ectric meter, the combination of a rotatable armature havinga plurality of windings, an independent core for each winding, and twofield coils on each side of the armature, the coils on one sidesurrounding opposite poles of the same armature windin cores and thecoils on the other side o the armature surrounding opposite polesof-oppositely magnetized armature Winding cores, the coils on each sideof the armature being angularly displaced and exerting a continuousrotative effort on the corresponding poles.

5. In an electric meter, the combination of a rotatable armature havinga plurality of windings, an independent core for each winding, and twofield coils on the same side of the armature surroundin opposite polesof the same armature win ing cores, such u coils being angularlydisplaced and exerting a continuous rotative effort on such poles.

6. In an electric meter, the combination of a rotatable armature havinga pluralitv of concentrated windings, an independent salient pole corefor each winding, and two ISU independent, field coils dis osed on thesame side of the armature so t at their rotative eects upon the magneticarmature poles overlap.

7. In an electric meter, the combination of a rotatable armature havinga plurality of windin s, an independent salient ole core for eac iwinding, and two indepen ent field coils on each side of the armature,the field coils being positioned so that their rotative effects upon themagnetic armature poles overlap. y

8. In an electric meter, the combination of rotatable armature windingseach having an independent ma ctie core provided with outwardly exten inradial ends, and a field coil disposed aroun the path of each set ofends on each side of the armature.

9. In an electric meter, the combination of rotatable armature windingseach having a ma etic core provided with outwardly exten ing radialends, and two fiat field coils on the same side of the armature disposedso that similar ends of such cores pass into and out of one of the coilsas the armature rotates while the other ends of the cores similarly passinto and out of the other coil.

10. In an electric meter, the combination of rotatable armature windingseach having a ma etic core provided with outwardly exten ing radialends, and two flat field coils on the same side of the armature disposedso that similar ends of such cores pass into and out of one of the coilsas the armature rotates while the other ends of the cores similarly passinto and out of the other coil, such field coils located so theirrotative effect upon the magnetic armature poles overlap.

11. In an electric meter the combination of rotatable armature win ingseach having a ma etic core provided with outwardly exten ing radialends, and two fiat field coils on each side of the armature, the coilson one side being disposed so that similar ends of such cores pass intoand out of one of the coils as the armature rotates while the other endsof the cores similarly pass into and out of the other coil, such fieldcoils being located so their rotative effect upon the magnetic armaturepoles overlap, and the fielda coils on the other side of the armaturebeing similarly disposed relatively to oppositely magnetized armaturecore ends.

12. In combination, an o en solenoid field coil, a shaft, a disk-shaperotatable armature, said coil embracing a segment of said disk-shapedarmature, said armature comprising a plurality of cores parallel withsaid shaft said cores having substantially radially projecting iron polepieces, independent armature windings on said cores for producing`salient poles, and a commutator to provi e for energizing said armature0-3 windings to causo rotation of the armature.

13. In combination an air core field coil, a rotatable armature, saidfield coil embracing a segment of said armature, said armaturecomprising a plurality of independent iron cores having substantiallyradially projecting iron pole pieces on each end thereof, said coreshaving independent armature windings thereupon, and a commutator .toprovi e for energizing said armature windings to cause and maintainrotation of the armature.

14. In combination, a field coil, a rotatable armature having a shaft,said armature comprising a plurality of U-shaped iron cores havin thebottoms of the U substantiall para lel with the shaft and having thelimbs of the U projecting radially outwardly, armature coils on said U-shaped cores, and a commutator to provide for energizin said cores inturn to produce rotation, said eld coil embracing the end of at leastone of said cores at all times.

15. In combination, a pair of field coils placed side by side, a.rotatable armature aving a .shaft located on one side of said fieldcoils, said armature comprising a plurality of U-shaped iron coreshaving wind` ings thereupon and having the limbs of the U-shaped coresprojecting into said field coils, and a commutator to provide forenergizing said armature cores in turn to prouce rotation.

16. In combination, a rotatable armature having a shaft, a pair of fieldcoils arranged side by side on one side of said shaft, said armaturecomprising a plurality of U- shaped iron cores havin armature windingsthereupon and havin the ends thereof projecting into said fieldgcoils,and a commiitator to provide for energizing said armature cores toproduce rotation.

17. In combination, a field coil, a rotatable armature havin a shaft,said armature comprising a plura ity of radially-projecting pole pieces,said pole ieces having their ends projecting into said3 field coil`armature windings on said pole ieces, said windings being disposed atrig t angles to said projectin pole pieces, and a commutator to provideor energizing said coils in turn to produce rotation of the armature.

18. In an electric meter the combination of a rotatable armature havinga plurality of independent windings, an inde endent core for eachwinding, a pole piece or each core, said pole pieces lying in a commonplane, each core having a salient pole produced therein and a commonopen field coil surrounding said pole pieces of such cores as thearmature rotates.

19. In combination a rotatable armature havin a shaft, an open fieldcoil on one side of sai shaft, said aramature com )rising a pliiralitvof radially projecting polie iieeas, said poe pieces proiecting into saifield pendent windings for said cores and sliding contact means forsupplying current to sal windings to produce rotation of said arma- 15ture.

In witness whereof, I hereunto subscribe my name this 20th day ofSeptember, A. D.

GUSTAVE A. SCHEEFFER.

Witnesses:

ELMER E. Sco'i'r, HULDAH RIMPLER.

Copies o! this patent may be obtained for ve cents each, by addressingthe Commissioner ot PatentsV Washington, D. C.

